package cn.edu.ctbu.datajpa1.webapi;


import cn.edu.ctbu.datajpa1.core.PageUtils;
import cn.edu.ctbu.datajpa1.domain.Student;
import cn.edu.ctbu.datajpa1.service.StudentService;
import jakarta.validation.Valid;
import jakarta.validation.constraints.NotNull;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.*;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.*;
import org.thymeleaf.util.StringUtils;

import java.util.List;

@RestController
@Slf4j

@RequestMapping("/webapi/student")
public class StudentRestController {

    @Autowired
    private StudentService studentService;



    /*
    * 读取的url:/webapi/student/list
    * @return
    * */
    @GetMapping("/list")
    public List<Student> getAll(){
        List<Student> students=studentService.findAll();

        return students;

    }

    /*
    * 分页读取全部内容
    * */
    @GetMapping("/getbypage")
    public PageUtils getByPage(@RequestParam(value = "page",defaultValue = "0")Integer page,
                               @RequestParam(value = "size",defaultValue = "10")Integer size,
                               @RequestParam(value = "name",defaultValue = "")String name){
        //按id排倒序
        Sort sort = Sort.by(Sort.Direction.DESC,"id");

        Page<Student> studentPage;
        if(StringUtils.isEmpty(name)){

            Pageable pageable=PageRequest.of(page,size,sort);
            studentPage=studentService.findAll(pageable);

        }else{
            Student student=new Student();
            student.setName(name);

            //全部模糊查询即 %{name}%
            Pageable pageable= PageRequest.of(0,10,sort);
            ExampleMatcher matcher=ExampleMatcher.matching()
                    .withMatcher("name",ExampleMatcher.GenericPropertyMatchers.contains());

            Example<Student> example=Example.of(student,matcher);
            studentPage=studentService.findAll(example,pageable);
        }

        PageUtils pageUtils=new PageUtils(studentPage.getContent(),studentPage.getTotalElements());

        return  pageUtils;



    }

    /*
     * 读取的url:/webapi/student/get/id
     * @return
     * */
    @GetMapping("/get/{id}")
    public Student get(@PathVariable Integer id){
        Student students=studentService.getById(id);
        students.setPassword("");

        return students;

    }

   /*
   * 新增学生的方法. /webapi/student/insert
   *@param student
   * @return
   * */
   @PostMapping(value = "/insert")
   public int insert(@Valid Student student, BindingResult bindingResult) {
       if (bindingResult.hasErrors()) {
           bindingResult.getFieldError().getDefaultMessage();
           return -1;
       }
       studentService.insert(student);
       String myName =student.getName();
       return myName.indexOf(myName);
   }

    /*
     * 更新学生的方法. /webapi/student/update
     *@param student
     * @return
     * */
    @PutMapping("/update")
    public Student update(Student student){
        //读取旧数据
        Student oldstudent=studentService.getById(student.getId());
        if(StringUtils.isEmpty(student.getPassword())){
            //没有新密码那么就是旧密码
            student.setPassword(oldstudent.getPassword());
        }

        student=studentService.update(student);
        return student;
    }

    /*
     * 删除学生的方法. /webapi/student/delete  用路径的方式删除
     *@param student
     * @return
     * */
    @DeleteMapping("/delete/{id}")
    public void delete(@PathVariable Integer id){

       studentService.delete(id);
    }

    /*
     * 按姓名查询 /webapi/student/find
     *@param student
     * @return
     * */
    @GetMapping("/find")
    @ResponseBody
    public List<Student> getStudentByName( String name) {
        List<Student> student1=studentService.findAll();

        return student1;
    }

    @PostMapping(value = "/add")
    public int add(@Valid Student student, @NotNull BindingResult bindingResult){
        if(bindingResult.hasErrors()){
            log.info(bindingResult.getFieldError().getDefaultMessage());
            return -1;
        }
        studentService.insert(student);

        String myName = student.getName();
        System.out.println(myName);
        if(myName!= null)
            return  1;
        return 0;
    }


}
